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Kinetic Plasma Modeling With Quiet Monte Carlo Direct Simulation
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Book Synopsis Kinetic Plasma Modeling with Quiet Monte Carlo Direct Simulation by :
Download or read book Kinetic Plasma Modeling with Quiet Monte Carlo Direct Simulation written by and published by . This book was released on 2001 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: The modeling of collisions among particles in space plasma media poses a challenge for computer simulation. Traditional plasma methods are able to model well the extremes of highly collisional plasmas (MHD and Hall-MHD simulations) and collisionless plasmas (particle-in-cell simulations). However, neither is capable of trealing the intermediate, semi-collisional regime. The authors have invented a new approach to particle simulation called Quiet Monte Carlo Direct Simulation (QMCDS) that can, in principle, treat plasmas with arbitrary and arbitrarily varying collisionality. The QMCDS method will be described, and applications of the QMCDS method as 'proof of principle' to diffusion, hydrodynamics, and radiation transport will be presented. Of particular interest to the space plasma simulation community is the application of QMCDS to kinetic plasma modeling. A method for QMCDS simulation of kinetic plasmas will be outlined, and preliminary results of simulations in the limit of weak pitch-angle scattering will be presented.
Book Synopsis Plasma Simulations by Example by : Lubos Brieda
Download or read book Plasma Simulations by Example written by Lubos Brieda and published by CRC Press. This book was released on 2019-12-13 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of plasmas is crucial in improving our understanding of the universe, and they are being increasingly utilised in key technologies such as spacecraft thrusters, plasma medicine, and fusion energy. Providing readers with an easy to follow set of examples that clearly illustrate how simulation codes are written, this book guides readers through how to develop C++ computer codes for simulating plasmas primarily with the kinetic Particle in Cell (PIC) method. This text will be invaluable to advanced undergraduates and graduate students in physics and engineering looking to learn how to put the theory to the test. Features: Provides a step-by-step introduction to plasma simulations with easy to follow examples Discusses the electrostatic and electromagnetic Particle in Cell (PIC) method on structured and unstructured meshes, magnetohydrodynamics (MHD), and Vlasov solvers Covered topics include Direct Simulation Monte Carlo (DSMC) collisions, surface interactions, axisymmetry, and parallelization strategies. Lubos Brieda has over 15 years of experience developing plasma and gas simulation codes for electric propulsion, contamination transport, and plasma-surface interactions. As part of his master’s research work, he developed a 3D ES-PIC electric propulsion plume code, Draco, which is to this date utilized by government labs and private aerospace firms to study plasma thruster plumes. His Ph.D, obtained in 2012 from George Washington University, USA, focused on a multi-scale model for Hall thrusters utilizing fluid-kinetic hybrid PIC codes. He has since then been involved in numerous projects involving development and the use of plasma simulation tools. Since 2014 he has been teaching online courses on plasma simulations through his website: particleincell.com.
Book Synopsis Kinetic Plasma Simulation: Meeting the Demands of Increased Complexity by : Adam Ryan Tableman
Download or read book Kinetic Plasma Simulation: Meeting the Demands of Increased Complexity written by Adam Ryan Tableman and published by . This book was released on 2019 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation concerns the development and use of numerical simulation techniques for studying nonlinear plasma systems in which accurate representations of the electron distribution function are required. The kinetic description of the electrons is accomplished via two different simulation modalities: the code OSHUN, which directly solves the Vlasov-Fokker-Planck (VFP) partial differential equation, and the code OSIRIS, which uses the particle-in-cell (PIC) method including an option for a separate Monte Carlo collision model. The dissertation consists of ten chapters that are based on reprints of refereed publications that describe the development and use of OSHUN and OSIRIS. The increasing complexity of today's computers necessitates an increase in the complexity of software to take full advantage of the available computing resources. This requires that software be engineered properly to ensure correct functioning and to enable more developers to contribute. The dissertation includes examples of the creation --- that is, combining new and novel algorithms with software engineering techniques --- and novel usage of simulation software packages capable of exploiting the power of today's computers to enable new capability and discovery. OSHUN includes relativistic corrections to the Vlasov equation but uses a non-relativistic description for the collision operator. The fields can be advanced in time using the full set of Maxwell's equations explicitly, just the electrostatic fields, or an implicit set of equations that includes Ampere's law without the displacement current. An arbitrary number of spherical harmonics can be included permitting efficient studies of physics when the distribution function is nearly in or far from equilibrium. This can drastically reduce the computational cost when only a few spherical harmonics are required. OSHUN was tested against a variety of problems spanning collisional and collisionless systems including Landau Damping, the two stream instability, Spitzer-Harm, and Epperlein-Haines heat flow coefficients in warm magnetized and unmagnetized plasmas. It was also used to explore how the heat flow in the laser entrance hole could modify Stimulated Raman Backscatter in Inertial Confinement Fusion relevant plasmas. New numerical/algorithmic techniques where implemented in the PIC code OSIRIS. In particular, new software engineering techniques facilitated the addition of an algorithm which uses PIC in the r-z coordinates system with a gridless description in the azimuthal angle \phi. The fields, equations, and current are decomposed into an azimuthal mode, m, expansion. This Quasi-3D description permits 3D simulations at a drastically lower computational cost (approaching the cost of 2D simulations) in systems that exhibit nearly azimuthal (cylindrical) symmetry. This capability was used to examine laser wakefield acceleration (LWFA). It was used to verify scaling laws for LWFA in a nonlinear, self-guide regime. The Quasi-3D algorithm was coupled to an independently developed module in OSIRIS that allows simulation of LWFA in a Lorentz-boosted frame. Doing the calculations in this frame yields a computational savings that scales as gamma^2 (where gamma is the Lorentz boost factor) which typically ranges from 100 to 100,000 in the systems under consideration. These modules required the development of novel field solvers and current deposition algorithms to eliminate a numerical instability called the Numerical Cerenkov Instability (NCI). These were added to OSIRIS using the new software engineering techniques now possible with Fortran 2003. OSIRIS was updated to utilize the Graphics Processing Units (GPUs) present in exascale systems like the Summit supercomputer recently built at the Oak Ridge National Laboratory. A GPU version of OSIRIS was used to examine the interactions of Laser Speckles from Stimulated Raman Scattering (SRS). It was found that speckles can mutually interact via scattering light, plasma waves, or non-thermal electrons transporting from speckles above threshold from SRS. This can trigger SRS in speckles that were below threshold. Efforts towards the ultimate (and ongoing) goal of fully integrating the Quasi-3D, Lorentz-boosted frame, and GPU modules is described. When combined, these modules have the potential speed up 3D laser-plasma simulations by immense factors of a million or more.
Book Synopsis Modeling Magnetospheric Plasma by : T. E. Moore
Download or read book Modeling Magnetospheric Plasma written by T. E. Moore and published by American Geophysical Union. This book was released on 1988 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 44. Existing models of the plasma distribution and dynamics in magnetosphere / ionosphere systems form a patchwork quilt of different techniques and boundaries chosen to define tractable problems. With increasing sophistication in both observational and modeling techniques has come the desire to overcome these limitations and strive for a more unified description of these systems. On the observational side, we have recently acquired routine access to diagnostic information on the lowest energy bulk plasma, completing our view of the plasma and making possible comparisons with magnetohydrodynamic calculations of plasma moments. On the theoretical side, rising computational capabilities and shrewdly designed computational techniques have permitted the first attacks on the global structure of the magnetosphere. Similar advances in the modeling of neutral atmospheric circulation suggest an emergent capability to globally treat the coupling between plasma and neutral gases. Simultaneously, computer simulation has proven to be a very useful tool for understanding magnetospheric behaviors on smaller space and time scales.
Book Synopsis Hybrid Gas/Plasma Simulations Using DSMC with the VORPAL Code by :
Download or read book Hybrid Gas/Plasma Simulations Using DSMC with the VORPAL Code written by and published by . This book was released on 2005 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: We are adding a Direct Simulation Monte Carlo model to the plasma simulations code VORPAL to model dilute (large Knudsen number) gases. This will allow VORPAL to run hybrid simulations of gas/plasma mixtures using the current plasma simulation capabilities of VORPAL along with the newly added DSMC capabilities. VORPAL is a multidimensional, parallel Particle-in-Cell plasma simulation code that supports a variety of models for both the plasma and electromagnetic fields. The DSMC simulation model is built on the existing PIC model by adding a Monte-Carlo collision model and adding the capability to do ensemble averaging. We present here the results of validation tests by comparing VORPAL simulations with an established DSMC code. These include simulations of 1D thermal Couette flow, 1D high speed Couette flow, and 1D heat transfer rate in the transition regime.
Book Synopsis EuroCVD 17/CVD 17 by : M. T. Swihart
Download or read book EuroCVD 17/CVD 17 written by M. T. Swihart and published by The Electrochemical Society. This book was released on 2009-09 with total page 1352 pages. Available in PDF, EPUB and Kindle. Book excerpt: This issue of ECS Transactions includes papers presented at the 2009 EuroCVD-17 and CVD 17 symposium. Topical areas covered include fundamentals of chemical vapor deposition (CVD), chemistry of precursors for CVD, synthesis of nanomaterials by CVD and related methods, industrial applications of CVD, and novel CVD reactors and processes. This issue is sold as a two-part set and also includes a CD-ROM of the entire issue.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1982 with total page 868 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
Book Synopsis Modern Methods in Collisional-Radiative Modeling of Plasmas by : Yuri Ralchenko
Download or read book Modern Methods in Collisional-Radiative Modeling of Plasmas written by Yuri Ralchenko and published by Springer. This book was released on 2016-02-25 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a compact yet comprehensive overview of recent developments in collisional-radiative (CR) modeling of laboratory and astrophysical plasmas. It describes advances across the entire field, from basic considerations of model completeness to validation and verification of CR models to calculation of plasma kinetic characteristics and spectra in diverse plasmas. Various approaches to CR modeling are presented, together with numerous examples of applications. A number of important topics, such as atomic models for CR modeling, atomic data and its availability and quality, radiation transport, non-Maxwellian effects on plasma emission, ionization potential lowering, and verification and validation of CR models, are thoroughly addressed. Strong emphasis is placed on the most recent developments in the field, such as XFEL spectroscopy. Written by leading international research scientists from a number of key laboratories, the book offers a timely summary of the most recent progress in this area. It will be a useful and practical guide for students and experienced researchers working in plasma spectroscopy, spectra simulations, and related fields.
Download or read book Physics Briefs written by and published by . This book was released on 1992 with total page 812 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Plasma Physics Index written by and published by . This book was released on 1981 with total page 834 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1988 with total page 1008 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fundamentals of Plasma Physics by : J. A. Bittencourt
Download or read book Fundamentals of Plasma Physics written by J. A. Bittencourt and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fundamentals of Plasma Physics is a general introduction designed to present a comprehensive, logical and unified treatment of the fundamentals of plasma physics based on statistical kinetic theory, with applications to a variety of important plasma phenomena. Its clarity and completeness makes the text suitable for self-learning and for self-paced courses. Throughout the text the emphasis is on clarity, rather than formality, the various derivations are explained in detail and, wherever possible, the physical interpretations are emphasized. The mathematical treatment is set out in great detail, carrying out the steps which are usually left to the reader. The problems form an integral part of the text and most of them were designed in such a way as to provide a guideline, stating intermediate steps with answers.
Book Synopsis Index to IEEE Publications by : Institute of Electrical and Electronics Engineers
Download or read book Index to IEEE Publications written by Institute of Electrical and Electronics Engineers and published by . This book was released on 1994 with total page 1032 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aerospace America written by and published by . This book was released on 2007 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geophysical Monograph written by and published by . This book was released on 1956 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Documentation of Plasma Physics. Pt. 1, Experimental Plasma Physics [and] Theoretical Plasma Physics by :
Download or read book Documentation of Plasma Physics. Pt. 1, Experimental Plasma Physics [and] Theoretical Plasma Physics written by and published by . This book was released on 1980 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1982 with total page 1284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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